"It's business as unusual for socially non-gendered BII operative Nightingale Spence. A joint mission between BIINT, ANI, and the Martian Marine Corps sees everyone involved facing tough choices – some more responsibly than others. Meanwhile, back in soggiest Bournemouth, with old ghosts out for revenge and temptation nagging him at every turn, Craig Campbell discovers that the life of a retired spy turned parent is no less hazardous than fieldwork..."